dash-listen-3.py

import sys

from ouimeaux.environment import Environment
from scapy.all import *

def on_switch(switch):
  print "WeMo Switch found:", switch.name
  print "Status:", "off" if switch.get_state() == 0 else "on"

def arp_display(pkt):
  try:
    if pkt[ARP].op == 1: #who-has (request)
      if pkt[ARP].psrc == '0.0.0.0': # ARP Probe
        if pkt[ARP].hwsrc == 'aa:bb:cc:dd:ee:ff': # Dash Button MAC
	  print "Dash Button pressed."
	  list = env.list_switches()
          if len(list) > 0:
	    switch = env.get_switch(list[0])
	    print "Toggling", switch.name + " ..."
	    switch.toggle()
            print "Switch is now", "off." if switch.get_state() == 0 else "on."
	  else:
	    print "No WeMo Switch found."
        else:
          print "ARP Probe from unknown device: " + pkt[ARP].hwsrc
  except:
    print "Unexpected error:", sys.exc_info()[0]

if __name__ == "__main__":
  print "---------------"
  print "Dash Switch"
  print "---------------"
  env = Environment(on_switch)
  env.start()
  print sniff(prn=arp_display, filter="arp", store=0)